I've started to have shoulder pain lately since i've started to really hit my shoulders hard. It had been tolerable for a while but then when i went to do chest last night my shoulders started to hurt bad. The thing is they don't hurt now or when i move them all around, they only hurt when i immitate them movement of the behind neck pulldown or when i push off things in a certain way( i can like push off a wall etc. but sometimes its just at that certain angle like pushing to sit up). Does anyone else have this similar problem, what could it be?